Nut-lock wrench



Jan. 15 1924.

B. A. BAR ET AL.

NUT LOCK WRENCH Filed Sept. 22, 1922 In" EIZE'JYTOIZIS flcrhey/lfiomn. .[dward/V Pofrhen ATT Y801 Patented Jan. 15, 1924.

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s'rmss PATENT Banner A. nnnon AND EDWARD M. rorcnna, or Los ANGELES, CALIFORNIA;

NUT-LOCK WRENCH.

Application filed September 22, 1922. Serial No. 589,835. 7

To all whom it may concern? Be it known that we, BARNEY A. BARON and EDWAR POFCHER, citizens of the United States, residing at Los Angeles, in

the county of Los Angeles and State of California, have invented new and useful Improvements in Nut-Lock Wrenches, of which the followingis a specification.

Our invention relates to nut i look wrenches, and a purpose ofour invention is theprovision'of a wrench of this character which is part1cularly adapted for use in conjunction with nut locks of the character em-. bodied in our copending application Serial 16 No filed to effect the unlocking of the nut to permit removal of the nut and bolt.

Although we'have herein shown and describedonly one form of nut lock wrench embodying our invention, and willpoint out the 'novelfeatures, thereof in claims, it is to be understood that various changes and modifications may be made without departing from the spirit ofthe invention and the spirit and scope of the appendedclaims.

In the accompanying drawings,

Figure 1 is a view showing inside elevation one form of'nut lock embodying our invention in applied position with respect to a nut lock j I Figure 2 isa top planview of the nut lock wrench shown in Figure 1; V V I Figure 3 is a sectional view taken on the line,33 of Figure 2. I Referring specifically to the drawings, in which similar reference characters refer to similar parts, our invention, iniits present embodiment, comprises a wrench portion including a shank "loprovided'at one end with a head 16 recessed to form a pair of spaced jaws 17. Formed integral with or suitably secured to the shank and the head 16 are standards 18 and 19, respectively, which are bifurcated at their outer or free ends and provided with pivot pins 20 and 21, respectively.

An operating lever 22 is extended between the bifurcated portions of the standard 18 and engaged by the pivot pin 20 to provide a fulcrum for the lever. The lever is pivotally connected at its forward end as in dicated at 23 to a link at, the latter being extended between the bifurcated portion of the standard 19 and engaged by the pin 21 for pivotally supporting the link. The forward end of he link is alsobifurcated and extended through this bifurcated portion is a pivot'pin 25 to which is attached a'releasing finger 26. As clearly shown in Figure 3, the releasing finger is of dovetailed form in cross section and is adapted to work within a correspondingly shaped groove 27" formed in one of the jaws 17.

The lever 22 is normally urged to the position shown in Figure 1 by means of a' leaf spring 28 secured to the standard 18 by means of the fastening members 29. v Inthis urged position of the lever 22, it operates the link 24 to cause the releasing finger 26 to occupy a retracted position with respect to the grooved jaw 17 However, when the lever 22 is pressed in the direction of the shank 15 against the tension of'thesprin'g 28, the link 24: is actuated to cause the releasing finger 26 to occupy a projected position, or a position. in which the'free end of the finger extends beyond the o uter side of the jaw' 17. j a I a r The character of nut lock for which the wrench is designed includes a lock washer 30 locked against rotative movement on a of the nut can be effected. I

In the applied -pos1t1onof the wrench with respect to portion is gage the nut 34:, the faces of the jaws being-preferably corrugated as shown in Figure 3 the nut.. With the wrench'portion so applied, the-releasing finger 26 is disposed opposite to the pawl 32 so that by depressing the lever 22, the releasing fingeris moved to projected position to engage the pawl and move the latter free of the corresponding tooth 33. In this position of the releasing finger, it is now possible to rotate the nut 34 a portion of a turn or until the releasing finger disengages the pawl so: that the nut lock, the wrench the latter engages with the succeeding tooth the whench so that the 33. By reapplying releasing finger is again opposite the pawl arranged so that the jaws 17 en to effect the secure, gripping of bolt shank 31 but capable of movement longitudinally thereof. This lock washer is Ill) to engage said pawl to move the latter away from'the nut so that the nut is free to be turned by manipulation of the wrench.

2. A nut lock wrench comprising a wrench 'portion including a shank and a head formed with jaws, one of said jawsheing provided with a groove, a releasing finger slidable in the groove to occupy projected or retracted position with respect to the corresponding jaw, and. lever operated means sustained on the wrench portion for moving the releasing finger to projected or retracted position.

3. nut lock wrench comprising a wrench portion including a shank and a head formed with jaws, one of said jaws being provided with a groove, a releasing finger slidable in the groove to occupy projected or retracted position with. respect to the corresponding jaw, a lever pivotally sustained on the wrench portion, and a fulcrumed'link operatively connecting the lever with the releasing finger to cause actuation of the finger upon movement of the lever.

at. A nut lock wrench comprising a wrench portion including a shank and a head formed with -jaws,.one of said jaws being provided with'a groove, a releasing finger slidable in the groove to occupy projected or retracted position. with respect to the corresponding jaw, a lever pivotally-sustained on the wrench portion, a fulcrumed link operatively connecting the lever with the releasing finger to cause actuation ofthe finger upon movement of the lever, and means for urging the lever to a position in which the releasing finger normall y occupies a retracted position.

5. nutlock wrench comprising a wrench P rti n includlng .1 re m of hi i formed with a dovetailed groove, a releasing finger of dovetail form in cross sect10n I and slidably mounted in said groove to occupy retracted or. projected position with respect to the corresponding jaw, a lever pivotally sustained on the wrench portion and operatively connected to the releasing finger, and means-for urging the lever to a position in which the releasing finger normally occupies a retractedposition."

6. A nut look wrench comprisinga wrench portion including a shank and a head dis posed at an angle with respectto the shank and provided with jaws, one of said'jaws being formed with a groove, a releasin 65 groove to occupy an e'xtended or retracted finger mounted" for sliding movement in sai position, a lever pivotally sustained on-the shank portion and having an angular-1y disposed extremity, a link pivoted on theheadportion and connected to the angular extremity and to said releasing finger to permit actuation of the latter upon movement of said lever, and means for urging the lever to a position in which the releasing finger is in retracted position.

7. A nut lock wrench, comprising a head,

a pawl releasing finger movable through the head to occupy retracted or projected, position, and lever operated means formoving the finger to projected or retracted position.

8. A nut lock wrench, comprising a head,

a releasing finger movable through the head position.

In testimony whereof we have signed our names to this specification.

B'ARNEY A BARON. EDWARD M. POFCI-IER. 

